Assisting Kystverket with “Northguider”
The trawler “Northguider” stranded at Sparreneset in the Hinlopen Strait on December 28th, 2018. The vessel has been abandoned and remains aground at Sparreneset on Nordaustlandet in the Hinlopen Strait, Spitsbergen at proximity to the shoreline in position 79° 53.9’ N 018° 04.7’ E on a Northeasterly heading. In the narrowest part of the Hinlopenstretet, there is a 40 nautical mile long submarine valley with a depth of 400 – 500 m, with sudden change in water depth. Drifting sea ice is expected at the grounded-vessel location. Sea ice can potentially exert significant forces on the grounded vessel. Considering the sensitive location of the vessel (i.e., around 100 - 200 m away from the sudden drop in the water depth), it is of great importance to know whether or not the vessel can be pushed by drifting sea ice into deeper waters before the planned salvage operation.
ArcISo AS was contacted by Kystverket (the Norwegian Coastal Administration) and took the responsibility of calculating the potential ice forces on the grounded vessel with the proprietary software Simulator for Arctic Marine Structures (SAMS). The calculated ice force and its associated force duration lead to better insights regarding if the vessel can be pushed off location by drifting sea ice or not. To establish the numerical simulations with SAMS, two tasks were carried out in this project. These are: 1) studying the environmental conditions at the site and establishing the numerical test matrix; and 2) conducting numerical simulations with different variables and presenting the results.
Related reports regarding this incident can be found in, e.g., (in Norwegian)